diff options
Diffstat (limited to 'jslinux-2019-12-21/tinyemu-2019-12-21/ide.c')
| -rw-r--r-- | jslinux-2019-12-21/tinyemu-2019-12-21/ide.c | 835 |
1 files changed, 835 insertions, 0 deletions
diff --git a/jslinux-2019-12-21/tinyemu-2019-12-21/ide.c b/jslinux-2019-12-21/tinyemu-2019-12-21/ide.c new file mode 100644 index 0000000..4952965 --- /dev/null +++ b/jslinux-2019-12-21/tinyemu-2019-12-21/ide.c @@ -0,0 +1,835 @@ +/* + * IDE emulation + * + * Copyright (c) 2003-2016 Fabrice Bellard + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <inttypes.h> +#include <assert.h> + +#include "cutils.h" +#include "ide.h" + +//#define DEBUG_IDE + +/* Bits of HD_STATUS */ +#define ERR_STAT 0x01 +#define INDEX_STAT 0x02 +#define ECC_STAT 0x04 /* Corrected error */ +#define DRQ_STAT 0x08 +#define SEEK_STAT 0x10 +#define SRV_STAT 0x10 +#define WRERR_STAT 0x20 +#define READY_STAT 0x40 +#define BUSY_STAT 0x80 + +/* Bits for HD_ERROR */ +#define MARK_ERR 0x01 /* Bad address mark */ +#define TRK0_ERR 0x02 /* couldn't find track 0 */ +#define ABRT_ERR 0x04 /* Command aborted */ +#define MCR_ERR 0x08 /* media change request */ +#define ID_ERR 0x10 /* ID field not found */ +#define MC_ERR 0x20 /* media changed */ +#define ECC_ERR 0x40 /* Uncorrectable ECC error */ +#define BBD_ERR 0x80 /* pre-EIDE meaning: block marked bad */ +#define ICRC_ERR 0x80 /* new meaning: CRC error during transfer */ + +/* Bits of HD_NSECTOR */ +#define CD 0x01 +#define IO 0x02 +#define REL 0x04 +#define TAG_MASK 0xf8 + +#define IDE_CMD_RESET 0x04 +#define IDE_CMD_DISABLE_IRQ 0x02 + +/* ATA/ATAPI Commands pre T13 Spec */ +#define WIN_NOP 0x00 +/* + * 0x01->0x02 Reserved + */ +#define CFA_REQ_EXT_ERROR_CODE 0x03 /* CFA Request Extended Error Code */ +/* + * 0x04->0x07 Reserved + */ +#define WIN_SRST 0x08 /* ATAPI soft reset command */ +#define WIN_DEVICE_RESET 0x08 +/* + * 0x09->0x0F Reserved + */ +#define WIN_RECAL 0x10 +#define WIN_RESTORE WIN_RECAL +/* + * 0x10->0x1F Reserved + */ +#define WIN_READ 0x20 /* 28-Bit */ +#define WIN_READ_ONCE 0x21 /* 28-Bit without retries */ +#define WIN_READ_LONG 0x22 /* 28-Bit */ +#define WIN_READ_LONG_ONCE 0x23 /* 28-Bit without retries */ +#define WIN_READ_EXT 0x24 /* 48-Bit */ +#define WIN_READDMA_EXT 0x25 /* 48-Bit */ +#define WIN_READDMA_QUEUED_EXT 0x26 /* 48-Bit */ +#define WIN_READ_NATIVE_MAX_EXT 0x27 /* 48-Bit */ +/* + * 0x28 + */ +#define WIN_MULTREAD_EXT 0x29 /* 48-Bit */ +/* + * 0x2A->0x2F Reserved + */ +#define WIN_WRITE 0x30 /* 28-Bit */ +#define WIN_WRITE_ONCE 0x31 /* 28-Bit without retries */ +#define WIN_WRITE_LONG 0x32 /* 28-Bit */ +#define WIN_WRITE_LONG_ONCE 0x33 /* 28-Bit without retries */ +#define WIN_WRITE_EXT 0x34 /* 48-Bit */ +#define WIN_WRITEDMA_EXT 0x35 /* 48-Bit */ +#define WIN_WRITEDMA_QUEUED_EXT 0x36 /* 48-Bit */ +#define WIN_SET_MAX_EXT 0x37 /* 48-Bit */ +#define CFA_WRITE_SECT_WO_ERASE 0x38 /* CFA Write Sectors without erase */ +#define WIN_MULTWRITE_EXT 0x39 /* 48-Bit */ +/* + * 0x3A->0x3B Reserved + */ +#define WIN_WRITE_VERIFY 0x3C /* 28-Bit */ +/* + * 0x3D->0x3F Reserved + */ +#define WIN_VERIFY 0x40 /* 28-Bit - Read Verify Sectors */ +#define WIN_VERIFY_ONCE 0x41 /* 28-Bit - without retries */ +#define WIN_VERIFY_EXT 0x42 /* 48-Bit */ +/* + * 0x43->0x4F Reserved + */ +#define WIN_FORMAT 0x50 +/* + * 0x51->0x5F Reserved + */ +#define WIN_INIT 0x60 +/* + * 0x61->0x5F Reserved + */ +#define WIN_SEEK 0x70 /* 0x70-0x7F Reserved */ +#define CFA_TRANSLATE_SECTOR 0x87 /* CFA Translate Sector */ +#define WIN_DIAGNOSE 0x90 +#define WIN_SPECIFY 0x91 /* set drive geometry translation */ +#define WIN_DOWNLOAD_MICROCODE 0x92 +#define WIN_STANDBYNOW2 0x94 +#define WIN_STANDBY2 0x96 +#define WIN_SETIDLE2 0x97 +#define WIN_CHECKPOWERMODE2 0x98 +#define WIN_SLEEPNOW2 0x99 +/* + * 0x9A VENDOR + */ +#define WIN_PACKETCMD 0xA0 /* Send a packet command. */ +#define WIN_PIDENTIFY 0xA1 /* identify ATAPI device */ +#define WIN_QUEUED_SERVICE 0xA2 +#define WIN_SMART 0xB0 /* self-monitoring and reporting */ +#define CFA_ERASE_SECTORS 0xC0 +#define WIN_MULTREAD 0xC4 /* read sectors using multiple mode*/ +#define WIN_MULTWRITE 0xC5 /* write sectors using multiple mode */ +#define WIN_SETMULT 0xC6 /* enable/disable multiple mode */ +#define WIN_READDMA_QUEUED 0xC7 /* read sectors using Queued DMA transfers */ +#define WIN_READDMA 0xC8 /* read sectors using DMA transfers */ +#define WIN_READDMA_ONCE 0xC9 /* 28-Bit - without retries */ +#define WIN_WRITEDMA 0xCA /* write sectors using DMA transfers */ +#define WIN_WRITEDMA_ONCE 0xCB /* 28-Bit - without retries */ +#define WIN_WRITEDMA_QUEUED 0xCC /* write sectors using Queued DMA transfers */ +#define CFA_WRITE_MULTI_WO_ERASE 0xCD /* CFA Write multiple without erase */ +#define WIN_GETMEDIASTATUS 0xDA +#define WIN_ACKMEDIACHANGE 0xDB /* ATA-1, ATA-2 vendor */ +#define WIN_POSTBOOT 0xDC +#define WIN_PREBOOT 0xDD +#define WIN_DOORLOCK 0xDE /* lock door on removable drives */ +#define WIN_DOORUNLOCK 0xDF /* unlock door on removable drives */ +#define WIN_STANDBYNOW1 0xE0 +#define WIN_IDLEIMMEDIATE 0xE1 /* force drive to become "ready" */ +#define WIN_STANDBY 0xE2 /* Set device in Standby Mode */ +#define WIN_SETIDLE1 0xE3 +#define WIN_READ_BUFFER 0xE4 /* force read only 1 sector */ +#define WIN_CHECKPOWERMODE1 0xE5 +#define WIN_SLEEPNOW1 0xE6 +#define WIN_FLUSH_CACHE 0xE7 +#define WIN_WRITE_BUFFER 0xE8 /* force write only 1 sector */ +#define WIN_WRITE_SAME 0xE9 /* read ata-2 to use */ + /* SET_FEATURES 0x22 or 0xDD */ +#define WIN_FLUSH_CACHE_EXT 0xEA /* 48-Bit */ +#define WIN_IDENTIFY 0xEC /* ask drive to identify itself */ +#define WIN_MEDIAEJECT 0xED +#define WIN_IDENTIFY_DMA 0xEE /* same as WIN_IDENTIFY, but DMA */ +#define WIN_SETFEATURES 0xEF /* set special drive features */ +#define EXABYTE_ENABLE_NEST 0xF0 +#define WIN_SECURITY_SET_PASS 0xF1 +#define WIN_SECURITY_UNLOCK 0xF2 +#define WIN_SECURITY_ERASE_PREPARE 0xF3 +#define WIN_SECURITY_ERASE_UNIT 0xF4 +#define WIN_SECURITY_FREEZE_LOCK 0xF5 +#define WIN_SECURITY_DISABLE 0xF6 +#define WIN_READ_NATIVE_MAX 0xF8 /* return the native maximum address */ +#define WIN_SET_MAX 0xF9 +#define DISABLE_SEAGATE 0xFB + +#define MAX_MULT_SECTORS 128 + +typedef struct IDEState IDEState; + +typedef void EndTransferFunc(IDEState *); + +struct IDEState { + IDEIFState *ide_if; + BlockDevice *bs; + int cylinders, heads, sectors; + int mult_sectors; + int64_t nb_sectors; + + /* ide regs */ + uint8_t feature; + uint8_t error; + uint16_t nsector; /* 0 is 256 to ease computations */ + uint8_t sector; + uint8_t lcyl; + uint8_t hcyl; + uint8_t select; + uint8_t status; + + int io_nb_sectors; + int req_nb_sectors; + EndTransferFunc *end_transfer_func; + + int data_index; + int data_end; + uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4]; +}; + +struct IDEIFState { + IRQSignal *irq; + IDEState *cur_drive; + IDEState *drives[2]; + /* 0x3f6 command */ + uint8_t cmd; +}; + +static void ide_sector_read_cb(void *opaque, int ret); +static void ide_sector_read_cb_end(IDEState *s); +static void ide_sector_write_cb2(void *opaque, int ret); + +static void padstr(char *str, const char *src, int len) +{ + int i, v; + for(i = 0; i < len; i++) { + if (*src) + v = *src++; + else + v = ' '; + *(char *)((long)str ^ 1) = v; + str++; + } +} + +/* little endian assume */ +static void stw(uint16_t *buf, int v) +{ + *buf = v; +} + +static void ide_identify(IDEState *s) +{ + uint16_t *tab; + uint32_t oldsize; + + tab = (uint16_t *)s->io_buffer; + + memset(tab, 0, 512 * 2); + + stw(tab + 0, 0x0040); + stw(tab + 1, s->cylinders); + stw(tab + 3, s->heads); + stw(tab + 4, 512 * s->sectors); /* sectors */ + stw(tab + 5, 512); /* sector size */ + stw(tab + 6, s->sectors); + stw(tab + 20, 3); /* buffer type */ + stw(tab + 21, 512); /* cache size in sectors */ + stw(tab + 22, 4); /* ecc bytes */ + padstr((char *)(tab + 27), "RISCVEMU HARDDISK", 40); + stw(tab + 47, 0x8000 | MAX_MULT_SECTORS); + stw(tab + 48, 0); /* dword I/O */ + stw(tab + 49, 1 << 9); /* LBA supported, no DMA */ + stw(tab + 51, 0x200); /* PIO transfer cycle */ + stw(tab + 52, 0x200); /* DMA transfer cycle */ + stw(tab + 54, s->cylinders); + stw(tab + 55, s->heads); + stw(tab + 56, s->sectors); + oldsize = s->cylinders * s->heads * s->sectors; + stw(tab + 57, oldsize); + stw(tab + 58, oldsize >> 16); + if (s->mult_sectors) + stw(tab + 59, 0x100 | s->mult_sectors); + stw(tab + 60, s->nb_sectors); + stw(tab + 61, s->nb_sectors >> 16); + stw(tab + 80, (1 << 1) | (1 << 2)); + stw(tab + 82, (1 << 14)); + stw(tab + 83, (1 << 14)); + stw(tab + 84, (1 << 14)); + stw(tab + 85, (1 << 14)); + stw(tab + 86, 0); + stw(tab + 87, (1 << 14)); +} + +static void ide_set_signature(IDEState *s) +{ + s->select &= 0xf0; + s->nsector = 1; + s->sector = 1; + s->lcyl = 0; + s->hcyl = 0; +} + +static void ide_abort_command(IDEState *s) +{ + s->status = READY_STAT | ERR_STAT; + s->error = ABRT_ERR; +} + +static void ide_set_irq(IDEState *s) +{ + IDEIFState *ide_if = s->ide_if; + if (!(ide_if->cmd & IDE_CMD_DISABLE_IRQ)) { + set_irq(ide_if->irq, 1); + } +} + +/* prepare data transfer and tell what to do after */ +static void ide_transfer_start(IDEState *s, int size, + EndTransferFunc *end_transfer_func) +{ + s->end_transfer_func = end_transfer_func; + s->data_index = 0; + s->data_end = size; +} + +static void ide_transfer_stop(IDEState *s) +{ + s->end_transfer_func = ide_transfer_stop; + s->data_index = 0; + s->data_end = 0; +} + +static int64_t ide_get_sector(IDEState *s) +{ + int64_t sector_num; + if (s->select & 0x40) { + /* lba */ + sector_num = ((s->select & 0x0f) << 24) | (s->hcyl << 16) | + (s->lcyl << 8) | s->sector; + } else { + sector_num = ((s->hcyl << 8) | s->lcyl) * + s->heads * s->sectors + + (s->select & 0x0f) * s->sectors + (s->sector - 1); + } + return sector_num; +} + +static void ide_set_sector(IDEState *s, int64_t sector_num) +{ + unsigned int cyl, r; + if (s->select & 0x40) { + s->select = (s->select & 0xf0) | ((sector_num >> 24) & 0x0f); + s->hcyl = (sector_num >> 16) & 0xff; + s->lcyl = (sector_num >> 8) & 0xff; + s->sector = sector_num & 0xff; + } else { + cyl = sector_num / (s->heads * s->sectors); + r = sector_num % (s->heads * s->sectors); + s->hcyl = (cyl >> 8) & 0xff; + s->lcyl = cyl & 0xff; + s->select = (s->select & 0xf0) | ((r / s->sectors) & 0x0f); + s->sector = (r % s->sectors) + 1; + } +} + +static void ide_sector_read(IDEState *s) +{ + int64_t sector_num; + int ret, n; + + sector_num = ide_get_sector(s); + n = s->nsector; + if (n == 0) + n = 256; + if (n > s->req_nb_sectors) + n = s->req_nb_sectors; +#if defined(DEBUG_IDE) + printf("read sector=%" PRId64 " count=%d\n", sector_num, n); +#endif + s->io_nb_sectors = n; + ret = s->bs->read_async(s->bs, sector_num, s->io_buffer, n, + ide_sector_read_cb, s); + if (ret < 0) { + /* error */ + ide_abort_command(s); + ide_set_irq(s); + } else if (ret == 0) { + /* synchronous case (needed for performance) */ + ide_sector_read_cb(s, 0); + } else { + /* async case */ + s->status = READY_STAT | SEEK_STAT | BUSY_STAT; + s->error = 0; /* not needed by IDE spec, but needed by Windows */ + } +} + +static void ide_sector_read_cb(void *opaque, int ret) +{ + IDEState *s = opaque; + int n; + EndTransferFunc *func; + + n = s->io_nb_sectors; + ide_set_sector(s, ide_get_sector(s) + n); + s->nsector = (s->nsector - n) & 0xff; + if (s->nsector == 0) + func = ide_sector_read_cb_end; + else + func = ide_sector_read; + ide_transfer_start(s, 512 * n, func); + ide_set_irq(s); + s->status = READY_STAT | SEEK_STAT | DRQ_STAT; + s->error = 0; /* not needed by IDE spec, but needed by Windows */ +} + +static void ide_sector_read_cb_end(IDEState *s) +{ + /* no more sector to read from disk */ + s->status = READY_STAT | SEEK_STAT; + s->error = 0; /* not needed by IDE spec, but needed by Windows */ + ide_transfer_stop(s); +} + +static void ide_sector_write_cb1(IDEState *s) +{ + int64_t sector_num; + int ret; + + ide_transfer_stop(s); + sector_num = ide_get_sector(s); +#if defined(DEBUG_IDE) + printf("write sector=%" PRId64 " count=%d\n", + sector_num, s->io_nb_sectors); +#endif + ret = s->bs->write_async(s->bs, sector_num, s->io_buffer, s->io_nb_sectors, + ide_sector_write_cb2, s); + if (ret < 0) { + /* error */ + ide_abort_command(s); + ide_set_irq(s); + } else if (ret == 0) { + /* synchronous case (needed for performance) */ + ide_sector_write_cb2(s, 0); + } else { + /* async case */ + s->status = READY_STAT | SEEK_STAT | BUSY_STAT; + } +} + +static void ide_sector_write_cb2(void *opaque, int ret) +{ + IDEState *s = opaque; + int n; + + n = s->io_nb_sectors; + ide_set_sector(s, ide_get_sector(s) + n); + s->nsector = (s->nsector - n) & 0xff; + if (s->nsector == 0) { + /* no more sectors to write */ + s->status = READY_STAT | SEEK_STAT; + } else { + n = s->nsector; + if (n > s->req_nb_sectors) + n = s->req_nb_sectors; + s->io_nb_sectors = n; + ide_transfer_start(s, 512 * n, ide_sector_write_cb1); + s->status = READY_STAT | SEEK_STAT | DRQ_STAT; + } + ide_set_irq(s); +} + +static void ide_sector_write(IDEState *s) +{ + int n; + n = s->nsector; + if (n == 0) + n = 256; + if (n > s->req_nb_sectors) + n = s->req_nb_sectors; + s->io_nb_sectors = n; + ide_transfer_start(s, 512 * n, ide_sector_write_cb1); + s->status = READY_STAT | SEEK_STAT | DRQ_STAT; +} + +static void ide_identify_cb(IDEState *s) +{ + ide_transfer_stop(s); + s->status = READY_STAT; +} + +static void ide_exec_cmd(IDEState *s, int val) +{ +#if defined(DEBUG_IDE) + printf("ide: exec_cmd=0x%02x\n", val); +#endif + switch(val) { + case WIN_IDENTIFY: + ide_identify(s); + s->status = READY_STAT | SEEK_STAT | DRQ_STAT; + ide_transfer_start(s, 512, ide_identify_cb); + ide_set_irq(s); + break; + case WIN_SPECIFY: + case WIN_RECAL: + s->error = 0; + s->status = READY_STAT | SEEK_STAT; + ide_set_irq(s); + break; + case WIN_SETMULT: + if (s->nsector > MAX_MULT_SECTORS || + (s->nsector & (s->nsector - 1)) != 0) { + ide_abort_command(s); + } else { + s->mult_sectors = s->nsector; +#if defined(DEBUG_IDE) + printf("ide: setmult=%d\n", s->mult_sectors); +#endif + s->status = READY_STAT; + } + ide_set_irq(s); + break; + case WIN_READ: + case WIN_READ_ONCE: + s->req_nb_sectors = 1; + ide_sector_read(s); + break; + case WIN_WRITE: + case WIN_WRITE_ONCE: + s->req_nb_sectors = 1; + ide_sector_write(s); + break; + case WIN_MULTREAD: + if (!s->mult_sectors) { + ide_abort_command(s); + ide_set_irq(s); + } else { + s->req_nb_sectors = s->mult_sectors; + ide_sector_read(s); + } + break; + case WIN_MULTWRITE: + if (!s->mult_sectors) { + ide_abort_command(s); + ide_set_irq(s); + } else { + s->req_nb_sectors = s->mult_sectors; + ide_sector_write(s); + } + break; + case WIN_READ_NATIVE_MAX: + ide_set_sector(s, s->nb_sectors - 1); + s->status = READY_STAT; + ide_set_irq(s); + break; + default: + ide_abort_command(s); + ide_set_irq(s); + break; + } +} + +static void ide_ioport_write(void *opaque, uint32_t offset, + uint32_t val, int size_log2) +{ + IDEIFState *s1 = opaque; + IDEState *s = s1->cur_drive; + int addr = offset + 1; + +#ifdef DEBUG_IDE + printf("ide: write addr=0x%02x val=0x%02x\n", addr, val); +#endif + switch(addr) { + case 0: + break; + case 1: + if (s) { + s->feature = val; + } + break; + case 2: + if (s) { + s->nsector = val; + } + break; + case 3: + if (s) { + s->sector = val; + } + break; + case 4: + if (s) { + s->lcyl = val; + } + break; + case 5: + if (s) { + s->hcyl = val; + } + break; + case 6: + /* select drive */ + s = s1->cur_drive = s1->drives[(val >> 4) & 1]; + if (s) { + s->select = val; + } + break; + default: + case 7: + /* command */ + if (s) { + ide_exec_cmd(s, val); + } + break; + } +} + +static uint32_t ide_ioport_read(void *opaque, uint32_t offset, int size_log2) +{ + IDEIFState *s1 = opaque; + IDEState *s = s1->cur_drive; + int ret, addr = offset + 1; + + if (!s) { + ret = 0x00; + } else { + switch(addr) { + case 0: + ret = 0xff; + break; + case 1: + ret = s->error; + break; + case 2: + ret = s->nsector; + break; + case 3: + ret = s->sector; + break; + case 4: + ret = s->lcyl; + break; + case 5: + ret = s->hcyl; + break; + case 6: + ret = s->select; + break; + default: + case 7: + ret = s->status; + set_irq(s1->irq, 0); + break; + } + } +#ifdef DEBUG_IDE + printf("ide: read addr=0x%02x val=0x%02x\n", addr, ret); +#endif + return ret; +} + +static uint32_t ide_status_read(void *opaque, uint32_t offset, int size_log2) +{ + IDEIFState *s1 = opaque; + IDEState *s = s1->cur_drive; + int ret; + + if (s) { + ret = s->status; + } else { + ret = 0; + } +#ifdef DEBUG_IDE + printf("ide: read status=0x%02x\n", ret); +#endif + return ret; +} + +static void ide_cmd_write(void *opaque, uint32_t offset, + uint32_t val, int size_log2) +{ + IDEIFState *s1 = opaque; + IDEState *s; + int i; + +#ifdef DEBUG_IDE + printf("ide: cmd write=0x%02x\n", val); +#endif + if (!(s1->cmd & IDE_CMD_RESET) && (val & IDE_CMD_RESET)) { + /* low to high */ + for(i = 0; i < 2; i++) { + s = s1->drives[i]; + if (s) { + s->status = BUSY_STAT | SEEK_STAT; + s->error = 0x01; + } + } + } else if ((s1->cmd & IDE_CMD_RESET) && !(val & IDE_CMD_RESET)) { + /* high to low */ + for(i = 0; i < 2; i++) { + s = s1->drives[i]; + if (s) { + s->status = READY_STAT | SEEK_STAT; + ide_set_signature(s); + } + } + } + s1->cmd = val; +} + +static void ide_data_writew(void *opaque, uint32_t offset, + uint32_t val, int size_log2) +{ + IDEIFState *s1 = opaque; + IDEState *s = s1->cur_drive; + int p; + uint8_t *tab; + + if (!s) + return; + p = s->data_index; + tab = s->io_buffer; + tab[p] = val & 0xff; + tab[p + 1] = (val >> 8) & 0xff; + p += 2; + s->data_index = p; + if (p >= s->data_end) + s->end_transfer_func(s); +} + +static uint32_t ide_data_readw(void *opaque, uint32_t offset, int size_log2) +{ + IDEIFState *s1 = opaque; + IDEState *s = s1->cur_drive; + int p, ret; + uint8_t *tab; + + if (!s) { + ret = 0; + } else { + p = s->data_index; + tab = s->io_buffer; + ret = tab[p] | (tab[p + 1] << 8); + p += 2; + s->data_index = p; + if (p >= s->data_end) + s->end_transfer_func(s); + } + return ret; +} + +static IDEState *ide_drive_init(IDEIFState *ide_if, BlockDevice *bs) +{ + IDEState *s; + uint32_t cylinders; + uint64_t nb_sectors; + + s = malloc(sizeof(*s)); + memset(s, 0, sizeof(*s)); + + s->ide_if = ide_if; + s->bs = bs; + + nb_sectors = s->bs->get_sector_count(s->bs); + cylinders = nb_sectors / (16 * 63); + if (cylinders > 16383) + cylinders = 16383; + else if (cylinders < 2) + cylinders = 2; + s->cylinders = cylinders; + s->heads = 16; + s->sectors = 63; + s->nb_sectors = nb_sectors; + + s->mult_sectors = MAX_MULT_SECTORS; + /* ide regs */ + s->feature = 0; + s->error = 0; + s->nsector = 0; + s->sector = 0; + s->lcyl = 0; + s->hcyl = 0; + s->select = 0xa0; + s->status = READY_STAT | SEEK_STAT; + + /* init I/O buffer */ + s->data_index = 0; + s->data_end = 0; + s->end_transfer_func = ide_transfer_stop; + + s->req_nb_sectors = 0; /* temp for read/write */ + s->io_nb_sectors = 0; /* temp for read/write */ + return s; +} + +IDEIFState *ide_init(PhysMemoryMap *port_map, uint32_t addr, uint32_t addr2, + IRQSignal *irq, BlockDevice **tab_bs) +{ + int i; + IDEIFState *s; + + s = malloc(sizeof(IDEIFState)); + memset(s, 0, sizeof(*s)); + + s->irq = irq; + s->cmd = 0; + + cpu_register_device(port_map, addr, 1, s, ide_data_readw, ide_data_writew, + DEVIO_SIZE16); + cpu_register_device(port_map, addr + 1, 7, s, ide_ioport_read, ide_ioport_write, + DEVIO_SIZE8); + if (addr2) { + cpu_register_device(port_map, addr2, 1, s, ide_status_read, ide_cmd_write, + DEVIO_SIZE8); + } + + for(i = 0; i < 2; i++) { + if (tab_bs[i]) + s->drives[i] = ide_drive_init(s, tab_bs[i]); + } + s->cur_drive = s->drives[0]; + return s; +} + +/* dummy PCI device for the IDE */ +PCIDevice *piix3_ide_init(PCIBus *pci_bus, int devfn) +{ + PCIDevice *d; + d = pci_register_device(pci_bus, "PIIX3 IDE", devfn, 0x8086, 0x7010, 0x00, 0x0101); + pci_device_set_config8(d, 0x09, 0x00); /* ISA IDE ports, no DMA */ + return d; +} |